A ravanahatha (variant names: ravanhatta, rawanhattha, ravanastron, ravana hasta veena) is an ancient bowed, stringed instrument, used in India, Sri Lanka and surrounding areas. It has been suggested as an ancestor of the violin.

The esraj is an Indian stringed instrument found in two forms throughout the Indian subcontinent. It is a relatively recent instrument, being only about 300 years old. It is found in North India, primarily Punjab, where it is used in Sikh music and Hindustani classical compositions and in West Bengal. The esraj is a modern variant of the dilruba, differing slightly in structure.

The Rudra veena (also spelled Rudraveena or Rudra vina)—also called Bīn in North India—is a large plucked string instrument used in Hindustani classical music, especially dhrupad. It is one of the major types of veena played in Indian classical music, notable for its deep bass resonance.

Pandit Balwant Rai Bhatt (23 September 1921 – 2 May 2016) was a noted Indian composer and musician of Hindustani Vocal Music.He was also known as Bhavrang (भावरंग). He died at his home in Varanasi on 2 May 2016.

Early life and background
Balwant Rai Bhatt was born in Bhavnagar, Gujarat to Smt. Harkunvar and Shri Gulabrai Bhatt on 23 September 1921

Pandit Vishnu Narayan Bhatkhande (10 August 1860 – 19 September 1936) was an Indian musicologist who wrote the first modern treatise on Hindustani classical music, an art which had been propagated for acenturies mostly through oral traditions. During those earlier times, the art had undergone several changes, rendering the raga grammar documented in scant old outdated texts.